(1) Any irrigation system used for the application of pesticides must be equipped with an antisiphon device adequate to protect against contamination of the water supply. The requirements of this section shall also apply to water supply lines to pesticide mixing-loading equipment other than those systems which incorporate a physical gap between the water source and the application equipment.
(2) It is unlawful for any person to apply chemicals through an irrigation system which is not equipped with an antisiphon device as required by this section, or to mix and load pesticides for application unless there is a physical gap or its equivalent between the line from the water source and the application equipment.
(3) Any governmental agency which requires antisiphon devices on irrigation systems used for the application of chemicals shall use the specific antisiphon device requirements adopted by the department.
